TABLE 58 Types of Cataracts

Posterior Capsular Opacification Grading

Congenital (formed in utero or during infancy) 1. Polar Anterior or posterior (axial area) of the lens capsule appears as fine white dots Gray round opacities surrounded by a dark, clear zone can occur in pre- or postnatal development Presenile (formed during early childhood young adulthood) 1. Coronary Wreath of opacities in periphery of cortex Senile (appearance generally following ages 30 to 40) 1. Nuclear Sclerosis (NS) Lens nucleus normally hardens with age index of refraction of nucleus...

Associated Problems Corneal Hypoxia

Contact Lens Staining Patterns

Corneal hypoxia lack of oxygen in rigid lenses often causes an area of edema that is central, rather than diffuse as in soft lenses. This central area is round or oval in the case of astigmatism , about 2.00 to 4.00 mm across, and grayish white. Draw or describe and grade any edema that is present. The edema becomes more dense as the condition worsens and may eventually be visible without the slit lamp. The problem may also be accompanied by superficial punctate corneal staining see Corneal...